After Surprise Immunity Win, Blindside at Tribal Council on 'Survivor' (VIDEO)

'Survivor: Redemption Island' (Wed., 8PM ET on CBS) ends with a two-hour finale this Sunday. Going into tonight's episode, there were still a whopping nine people in contention for the top prize, though four of them were on Redemption Island. From there, it was confirmed that only one stood a chance of returning to the game.

Rob Mariano has been in sole charge of this season of 'Survivor' since virtually Day One. He masterminded the massacre and total elimination of the Zapatera tribe, and has orchestrated the demise by blindside of every person who's gone home on Ometepe.

But this was arguably the biggest vote of the game. From here, the Final Four is determined. The only wild card element, that Rob continues to struggle with, is who Redemption Island sends back into the game. If they come back at Final Four, there's the chance of an alliance against Rob. Certainly, whoever comes back isn't going to be very happy with him.

!!SPOILER ALERT!!

Nevertheless, a decision was made this week to send Ashley to Redemption Island. Rob wanted to break up Ashley and Natalie because he knows all too well the power of a strong pair in the game. Ashley was his obvious target, but she messed that up by winning Immunity at the Challenge.

So, the obvious choice would be to get rid of Natalie at that point, right? Well, Ashley had presented her desire to get rid of Grant, as he could compete strongly on Redemption Island. If he came back, maybe he'd be less bitter.

Ralph lost this week at Redemption Island, leaving Mike and Matt still going strong, and Andrea winning her first bout. With Grant joining them, he stands a fair chance of winning. But is it a risky move? Will Ashley and Natalie team up? If Andrea comes back, they would be an easy threesome. Matt or Mike would also happily ally with the girls against Rob.

The problem is, that Natalie is staying very loyal to him, and Phillip seems convinced he can beat Rob in the Finals. We're not sure either of them would flip away from the Robfather at this point in the game.